Resonant charge transfer in grazing atom-metal surface collisions: Effect of the presence of steps on the surface

被引:8
|
作者
Makhmetov, GE
Borisov, AG
TeilletBilly, D
Gauyacq, JP
机构
[1] UNIV PARIS 11,URA CNRS D0281,COLLIS ATOM & MOL LAB,F-91405 ORSAY,FRANCE
[2] MOSCOW MV LOMONOSOV STATE UNIV,DEPT PHYS,MOSCOW,RUSSIA
关键词
aluminium; atom-solid interactions; scattering; diffraction; ion-solid interactions; scattering channeling; jellium models; stepped single crystal surfaces;
D O I
10.1016/0039-6028(96)00942-9
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The resonant charge transfer process between an atom and a metal surface is studied in the case of a stepped surface. A sudden approximation is introduced to model the effect of steps in the dynamics of the charge transfer process for grazing angle collisions. It is applied to the problem of H- formation by scattering on AI(111) surfaces. The final H- fractions are demonstrated to be very sensitive to the density of steps on the surface. A large difference between the effect of steps up and down is found. The analysis of this phenomenon is performed. The results are compared with the experimental results of Wyputta et al. [Nucl. Instrum. Methods B 58 (1991) 379].
引用
收藏
页码:L769 / L774
页数:6
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